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   &#160;<span id="projectnumber">0.2</span>
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   <div id="projectbrief">Generic and Reusable Parallel Pattern Interface</div>
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<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_3a90233651aeb6de4309a51b31e57ac6.html">omp</a></li>  </ul>
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<a href="omp_2map_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">* @version    GrPPI v0.2</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">* @copyright    Copyright (C) 2017 Universidad Carlos III de Madrid. All rights reserved.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">* @license    GNU/GPL, see LICENSE.txt</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">* This program is free software: you can redistribute it and/or modify</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">* it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">* the Free Software Foundation, either version 3 of the License, or</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">* (at your option) any later version.</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">*</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">* This program is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">* but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">* GNU General Public License for more details.</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">*</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">* You have received a copy of the GNU General Public License in LICENSE.txt</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">* also available in &lt;http://www.gnu.org/licenses/gpl.html&gt;.</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">*</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">* See COPYRIGHT.txt for copyright notices and details.</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">*/</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#ifndef GRPPI_OMP_MAP_H</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#define GRPPI_OMP_MAP_H</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#ifdef GRPPI_OMP</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="parallel__execution__omp_8h.html">parallel_execution_omp.h</a>&quot;</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacegrppi.html">grppi</a> {</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> InputIt, <span class="keyword">typename</span> OutputIt, <span class="keyword">typename</span> Transformer,</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;          <span class="keyword">typename</span> ... OtherInputIts&gt;</div><div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="namespacegrppi.html#a9cd83cb2cad44d4467f7138cd01c612d">   32</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="namespacegrppi.html#a9cd83cb2cad44d4467f7138cd01c612d">internal_map</a>(<a class="code" href="classgrppi_1_1parallel__execution__omp.html">parallel_execution_omp</a> &amp; ex, </div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;                  InputIt first, InputIt last, </div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;                  OutputIt first_out,</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;                  Transformer &amp;&amp; transf_op, </div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;                  <span class="keywordtype">int</span> i, </div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;                  <span class="keywordtype">int</span> elemperthr, OtherInputIts ... more_firsts)</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;{</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;  <span class="comment">//Calculate local input and output iterator </span></div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;  <span class="keyword">auto</span> begin = first + (elemperthr * i);</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;  <span class="keyword">auto</span> end = first + (elemperthr * (i+1));</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;  <span class="keywordflow">if</span>( i == ex.<a class="code" href="classgrppi_1_1parallel__execution__omp.html#ac46ceef1db7f46cc7c93a2e1f4a43f08">concurrency_degree</a>()-1) end = last;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;  <span class="keyword">auto</span> out = first_out + (elemperthr * i);</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;  <a class="code" href="namespacegrppi.html#a6222cb3c656980019f3e0365a475f1be">advance_iterators</a>(elemperthr*i, more_firsts ...);</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;  <span class="keywordflow">while</span>(begin!=end){</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    *out = transf_op(*begin, *more_firsts ...);</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;    <a class="code" href="namespacegrppi.html#a6222cb3c656980019f3e0365a475f1be">advance_iterators</a>(more_firsts ...);</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    begin++;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    out++;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;  }</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;}</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> InputIt, <span class="keyword">typename</span> OutputIt, <span class="keyword">typename</span> Transformer&gt;</div><div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="group__map__pattern__omp.html#gae4e48f32027d524cab48555684986ab5">   74</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="group__map__pattern__native.html#ga219611f3c6719598a8810d6ea6cafe2a">map</a>(<a class="code" href="classgrppi_1_1parallel__execution__omp.html">parallel_execution_omp</a> &amp; ex, </div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;         InputIt first, InputIt last, </div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;         OutputIt first_out, </div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;         Transformer &amp;&amp; transf_op)</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;{</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;  <span class="keywordtype">int</span> numElements = last - first;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  <span class="keywordtype">int</span> elemperthr = numElements/ex.<a class="code" href="classgrppi_1_1parallel__execution__omp.html#ac46ceef1db7f46cc7c93a2e1f4a43f08">concurrency_degree</a>();</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="preprocessor">  #pragma omp parallel</span></div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  {</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="preprocessor">   #pragma omp single nowait</span></div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;   {</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=1;i&lt;ex.<a class="code" href="classgrppi_1_1parallel__execution__omp.html#ac46ceef1db7f46cc7c93a2e1f4a43f08">concurrency_degree</a>();i++){</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;      </div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="preprocessor">      #pragma omp task firstprivate(i)</span></div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;      {</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        <span class="keyword">auto</span> begin = first + (elemperthr * i);</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        <span class="keyword">auto</span> end = first + (elemperthr * (i+1));</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        <span class="keywordflow">if</span>(i == ex.<a class="code" href="classgrppi_1_1parallel__execution__omp.html#ac46ceef1db7f46cc7c93a2e1f4a43f08">concurrency_degree</a>() -1 ) end = last;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        <span class="keyword">auto</span> out = first_out + (elemperthr * i);</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        <span class="keywordflow">while</span>(begin!=end){</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;          *out = transf_op(*begin);</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;          begin++;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;          out++;</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;        }</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;      }</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;     }</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;      <span class="comment">//Map main threads</span></div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;      <span class="keyword">auto</span> beg =first;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;      <span class="keyword">auto</span> out = first_out;</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;      <span class="keyword">auto</span> end = first+elemperthr;</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;      <span class="keywordflow">while</span>(beg!=end){</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;            *out = transf_op(*beg);</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;            beg++;</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;            out++;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;      }</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;<span class="preprocessor">      #pragma omp taskwait</span></div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    }</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;  }</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;}</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> InputIt, <span class="keyword">typename</span> OutputIt, <span class="keyword">typename</span> Transformer,</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;          <span class="keyword">typename</span> ... OtherInputIts&gt;</div><div class="line"><a name="l00134"></a><span class="lineno"><a class="line" href="group__map__pattern__omp.html#ga18fa29a344697d52b3c845d7880bde19">  134</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="group__map__pattern__native.html#ga219611f3c6719598a8810d6ea6cafe2a">map</a>(<a class="code" href="classgrppi_1_1parallel__execution__omp.html">parallel_execution_omp</a> &amp; ex, </div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;         InputIt first, InputIt last, </div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;         OutputIt first_out, </div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;         Transformer &amp;&amp; transf_op, </div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;         OtherInputIts ... more_firsts)</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;{</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;  <span class="comment">//Calculate number of elements per thread</span></div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;  <span class="keywordtype">int</span> numElements = last - first;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;  <span class="keywordtype">int</span> elemperthr = numElements/ex.<a class="code" href="classgrppi_1_1parallel__execution__omp.html#ac46ceef1db7f46cc7c93a2e1f4a43f08">concurrency_degree</a>();</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;  <span class="comment">//Create tasks</span></div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;<span class="preprocessor">  #pragma omp parallel</span></div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;  {</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;<span class="preprocessor">    #pragma omp single nowait</span></div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    {</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;      <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=1;i&lt;ex.<a class="code" href="classgrppi_1_1parallel__execution__omp.html#ac46ceef1db7f46cc7c93a2e1f4a43f08">concurrency_degree</a>();i++){</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;<span class="preprocessor">      #pragma omp task firstprivate(i)</span></div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;      {</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;        <a class="code" href="namespacegrppi.html#a9cd83cb2cad44d4467f7138cd01c612d">internal_map</a>(ex, first, last, first_out,</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;                     std::forward&lt;Transformer&gt;(transf_op) , i, elemperthr, </div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;                     more_firsts ...);</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;      }</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;      <span class="comment">//End task</span></div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;     }</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;     <span class="comment">//Map main thread</span></div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;     <a class="code" href="namespacegrppi.html#a9cd83cb2cad44d4467f7138cd01c612d">internal_map</a>(ex, first,last, first_out, </div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;                  std::forward&lt;Transformer&gt;(transf_op), 0, elemperthr, </div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;                  more_firsts ...);</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    <span class="comment">//Join threads</span></div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="preprocessor">    #pragma omp taskwait</span></div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    }</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;  }</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;}</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;}</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="namespacegrppi_html"><div class="ttname"><a href="namespacegrppi.html">grppi</a></div><div class="ttdef"><b>Definition:</b> callable_traits.h:24</div></div>
<div class="ttc" id="namespacegrppi_html_a9cd83cb2cad44d4467f7138cd01c612d"><div class="ttname"><a href="namespacegrppi.html#a9cd83cb2cad44d4467f7138cd01c612d">grppi::internal_map</a></div><div class="ttdeci">void internal_map(parallel_execution_omp &amp;ex, InputIt first, InputIt last, OutputIt first_out, Transformer &amp;&amp;transf_op, int i, int elemperthr, OtherInputIts...more_firsts)</div><div class="ttdef"><b>Definition:</b> omp/map.h:32</div></div>
<div class="ttc" id="classgrppi_1_1parallel__execution__omp_html"><div class="ttname"><a href="classgrppi_1_1parallel__execution__omp.html">grppi::parallel_execution_omp</a></div><div class="ttdoc">OpenMP parallel execution policy. </div><div class="ttdef"><b>Definition:</b> parallel_execution_omp.h:40</div></div>
<div class="ttc" id="namespacegrppi_html_a6222cb3c656980019f3e0365a475f1be"><div class="ttname"><a href="namespacegrppi.html#a6222cb3c656980019f3e0365a475f1be">grppi::advance_iterators</a></div><div class="ttdeci">void advance_iterators(size_t delta, InputIt &amp;...in)</div><div class="ttdef"><b>Definition:</b> iterator.h:29</div></div>
<div class="ttc" id="parallel__execution__omp_8h_html"><div class="ttname"><a href="parallel__execution__omp_8h.html">parallel_execution_omp.h</a></div></div>
<div class="ttc" id="classgrppi_1_1parallel__execution__omp_html_ac46ceef1db7f46cc7c93a2e1f4a43f08"><div class="ttname"><a href="classgrppi_1_1parallel__execution__omp.html#ac46ceef1db7f46cc7c93a2e1f4a43f08">grppi::parallel_execution_omp::concurrency_degree</a></div><div class="ttdeci">int concurrency_degree() const noexcept</div><div class="ttdoc">Get number of grppi trheads. </div><div class="ttdef"><b>Definition:</b> parallel_execution_omp.h:85</div></div>
<div class="ttc" id="group__map__pattern__native_html_ga219611f3c6719598a8810d6ea6cafe2a"><div class="ttname"><a href="group__map__pattern__native.html#ga219611f3c6719598a8810d6ea6cafe2a">grppi::map</a></div><div class="ttdeci">void map(parallel_execution_native &amp;ex, InputIt first, InputIt last, OutputIt first_out, Transformer &amp;&amp;transf_op)</div><div class="ttdoc">Invoke Map pattern on a data sequence with native paralell execution. </div><div class="ttdef"><b>Definition:</b> native/map.h:50</div></div>
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